US20150306341A1 - Isolation floatation chamber - Google Patents
Isolation floatation chamber Download PDFInfo
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- US20150306341A1 US20150306341A1 US14/265,336 US201414265336A US2015306341A1 US 20150306341 A1 US20150306341 A1 US 20150306341A1 US 201414265336 A US201414265336 A US 201414265336A US 2015306341 A1 US2015306341 A1 US 2015306341A1
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- solution
- enclosure
- disinfection
- isolation
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- 239000000243 solution Substances 0.000 claims abstract description 65
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 56
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 31
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Images
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Definitions
- the present invention relates to isolation chambers. More specifically, the present invention relates to systems and methods for disinfecting floatation tanks.
- An isolation chamber or floatation tank, is a dark, soundproofed enclosure containing a layer of salt water upon which a user floats, typically for relaxation or meditation purposes.
- the chamber is designed to isolate the user from external stimuli such as light, sound, smell, and, in particular, gravity.
- Epsom salt is usually added to the water in the isolation tank to increase the density of the solution such that the user floats comfortably near the surface with the face above the water. The buoyancy created by this salt solution effectively eliminates the body's specific gravity, bringing the floater close to an experience of total weightlessness.
- Isolation chambers for commercial usage must maintain proper sanitation practices to ensure a safe and healthy environment for the users. As with swimming pools and other recreational water facilities, the water in an isolation chamber is subject to undesirable contaminants introduced by the users and environment. These contaminants may include pathogenic micro-organisms such as viruses, bacteria, protozoa, and fungi. Commercial isolation chambers should therefore include a properly designed disinfection system for killing these micro-organisms to prevent the transmission of infectious diseases.
- Chlorine disinfection is inexpensive, quick and effective at killing most pathogenic microbes, and leaves a residual in the water that continues disinfecting for a long period of time. Residual chlorine is desirable, and often required, for public swimming pools and similar venues where a user may be exposed to contaminants introduced by other swimmers. This residual is used to validate a certain level of decontamination. This criteria is designed to be used with regular water in an open space.
- Chemical disinfectants react with organic matter to produce toxic disinfection by-products such as trihalomethanes, haloacetic acids, chlorite, and others.
- chlorine reacts with ammonia or nitrogen containing compounds such as sweat, saliva, and urine to produce chloramines.
- Exposure to chloramines can cause respiratory problems, rashes and other skin conditions, eye irritation, digestive disorders, and other health issues.
- chloramines also produce an irritating odor which is particularly undesirable for isolation chambers, where the desired goal is to isolate the user as much as possible from external stimuli.
- the need in the art is addressed by the isolation system of the present invention.
- the novel system includes an enclosure for providing a lightless and soundproofed environment and for containing a solution for supporting a user in a state of floatation; a disinfection system for disinfecting the solution, the disinfection system including an ultraviolet disinfection system and an ozone injection system; and a pump for removing the solution from the enclosure and circulating it through the disinfection system at a predetermined flow rate.
- the disinfection system includes a multi-stage filtration system with a 10 micron pre-filter, a 5 micron pre-filter, and a 0.5 micron filter; a 150 Watt medium-pressure ultraviolet lamp; a 4 grams/hr ozone generator; and a pump for providing a flow-rate of about 90 gallons per minute.
- the enclosure is formed from interlocking, foam-insulated panels and lined with a potable liner that holds the solution.
- an improved method of disinfection is taught using UV radiation with ozone injection.
- Ozone has a short half-life and leaves substantially no toxic byproducts. Verification of disinfection can be accomplished by monitoring the dissolved ozone, which can be determined accurately utilizing a dissolved ozone sensor system.
- FIG. 1 is a simplified diagram of an isolation system designed in accordance with an illustrative embodiment of the present invention.
- FIG. 2 is a simplified diagram of an interior of an isolation chamber designed in accordance with an illustrative embodiment of the present invention.
- FIG. 3 is a simplified diagram showing a cut-out view of two insulated panels designed in accordance with an illustrative embodiment of the present invention.
- the present invention provides a novel isolation chamber and disinfection system designed for commercial usage. Unlike conventional isolation tanks, the inventive system does not rely on chemical disinfectants. Instead, it uses a combination of UV (ultraviolet) radiation and ozone to disinfect the floatation solution. In accordance with the present teachings, the solution is disinfected between each and every use. Thus, there is no need for a residual disinfect (that continues disinfecting during operation) since there is no cross-contamination between users. The only contaminants that a user would be exposed to are the contaminants brought into the chamber by the user himself, and any contaminants remaining in the solution after the disinfection process. The system is therefore designed to thoroughly kill pathogens and break down organic compounds in the solution without producing any harmful by-products, leaving a pure, clean, and safe environment for the next user.
- FIG. 1 is a simplified diagram showing an external view of an isolation system 10 designed in accordance with an illustrative embodiment of the present invention
- FIG. 2 shows an interior view of the isolation chamber 12
- the isolation system 10 includes an isolation chamber 12 , which is a lightless, soundproofed enclosure designed to provide a light- and sound-free environment therein.
- a door 14 provides access to the chamber 12 .
- the chamber 12 contains a solution 16 having a specific gravity of about 1.25 to 1.3 for supporting a user in a state of floatation.
- the chamber 12 contains a 12 inch deep, saturated solution 16 of 1000 lbs of USP grade magnesium sulfate (Epsom salt) in about 250 gallons of water.
- the chamber 12 includes heating pads 18 coupled to a heater controller 20 and sensor 22 for maintaining the temperature of the solution to match skin temperature (approximately 95°). The user floats in the chamber 12 in a dark, silent environment, with a feeling of weightlessness.
- the chamber 12 is formed from interlocking insulated panels 24 .
- FIG. 3 shows a cut-out view of two insulated panels 24 designed in accordance with an illustrative embodiment of the present teachings.
- Each panel 24 includes a 3.5′′ thick wood frame 26 with an exterior skin 28 and interior skin 30 .
- the skins 28 and 30 are made from aluminum, stainless steel, or other anodized metal.
- the interior of the panel 24 is filled with injected foam insulation 32 such as polyurethane or polystyrene.
- the panels 24 also include steel cam locks 34 for securely attaching adjacent panels 24 together. Similar panels are commonly used for walk-in refrigeration units. These panels 24 are excellent for creating a sturdy, light-proof, sound resistant, and non-rusting enclosure for the isolation chamber 12 that can be easily assembled and dismantled.
- the size of the chamber 12 should be sufficient for a single user to easily enter and exit as well as stand up and lay down inside (minimum 4 ft width, 8 ft length, and 7 ft height).
- the enclosure 12 should have a non-latching door 14 that pushes open easily from the inside (using, for example, magnetic gaskets).
- the door 14 should seal flat on the outside so that the door 14 cannot be opened from the outside without the use of the exterior handle 15 , which should be positioned horizontal at about 48′′ from the ground so that a child cannot enter the chamber 12 without help from an adult.
- the door 14 should be a minimum of 29′′ wide by 50′′ tall.
- Safety grab bars may be included inside the enclosure 12 for user assistance.
- the interior of the chamber 12 includes a liner 40 for containing the floatation solution 16 .
- the liner 40 is made from potable, non-toxic PVC, preferably at least 0.40 mil thick.
- the liner 40 can be custom made to fit the size and shape of the enclosure 12 and then attached to the panels 24 of the chamber 12 using hang tabs positioned along the top outer perimeter. The tabs are stapled into the rim prior to the placement of the ceiling panel to secure the liner 40 in position.
- the liner 40 fully encompasses the interior dimensions of the structure 12 .
- a non-slip floor pad should be added on top of the liner 40 near the entry.
- the heating pads 18 are attached using adhesive to the interior wall of the chamber 12 between the insulated panel 24 and the liner 40 , at a height where the entire pad is below the water level. The user is therefore never in direct contact with the heaters 18 , only with the non-toxic liner 40 , the potable suction fittings 54 (shown in FIG. 2 ), and the purified solution 16 .
- the isolation system 10 includes a novel disinfection system 50 located external to the chamber 12 for cleaning and disinfecting the solution 16 before each use.
- the disinfection system 50 includes a pump 52 for removing the solution 16 from the chamber 12 , a filtration system 60 for removing larger particles from the solution 16 , a UV disinfection system 70 , and an ozone injection system 80 .
- the pump 52 is a 1 hp high-head pump that circulates the solution 16 through the disinfection system 50 at a flow rate of about 90 gal/min.
- the flow rate must be compatible with the UV disinfection system 70 . UV radiation is only effective at a certain flow rate. If the solution travels through the system 70 too quickly, it will not receive enough UV exposure to have an adequate kill factor. If the flow is too slow, however, heat may build up and damage the UV lamp 72 .
- the solution 16 is extracted from the chamber 12 by the pump 52 through two VGB compliant suction fittings 54 (shown in FIG. 2 ), located at least 36 inches apart.
- a 2′′ cross 56 is positioned directly in the center of the two suction fittings 54 to ensure that the pump 52 is pulling solution equally from both sides. Pulling the solution 16 from two locations safeguards that if someone is in the chamber 12 while the pump 52 is on, he will not be trapped by the suction and held underwater. Even though the disinfection system is not designed to be used when someone is in the chamber 12 , the system 10 should still be VGA compliant for optimal safety.
- the suction fittings 54 are 4′′ Schedule 80 PVC vertical slot suction fittings serve as turbulent water intakes.
- the vertical slot suction fittings 54 are used to effectively remove surface debris (such as hair, skin cells, micro-organisms, etc.) from the solution 16 , each at a rate of about 50 gallons per minute.
- Each partially submerged vertical slot suction fitting 54 has eight 1 ⁇ 4′′ wide vertical slots that run the elevation of the fitting permitting the solution 16 to be pulled from variable depths, from all around (360 degrees), and without pulling air into system.
- the vertical slot suction fittings 54 should be APSP-16 compliant.
- the filtration system 60 includes at least two filters: a pre-filter 62 with a 5 micron cartridge followed by a filter 64 with a 0.5 micron cartridge.
- the filtration system 60 also includes an additional pre-filter 66 with a 10 micron cartridge before the 5 micron pre-filter 62 .
- the filtration system 60 therefore removes all particles larger than 0.5 microns from the solution 16 . This is important since the presence of particles can reduce the effectiveness of the UV disinfection. Filter cartridges used for conventional pool filtration systems (typically 20 micron) are insufficient for this purpose. Cartridges rated at 5 micron and 0.5 micron can be custom made by a good filter manufacturer.
- the 2′′ cross 56 includes a 0.5′′ ball valve out of the top port that works as a pressure release so that the filters can be serviced without entering the chamber 12 to release the pressure by removing the suction fittings 54 at the 1.5′′ unions.
- the UV disinfection system 70 includes a UV lamp 72 positioned to irradiate the solution 16 as it flows by.
- the UV lamp 72 should include a 150 W, medium-pressure (broad spectrum) germicidal UV bulb with a close proximity Schedule 80 housing.
- the system 70 also includes a UV ballast 74 for regulating the electrical current flow to the UV bulb 72 .
- the ballast 74 minimizes power fluctuations that can affect the wavelength of the UV radiation and reduce the effectiveness of the UV disinfection.
- UV disinfection is highly effective at inactivating microorganisms if the solution is properly filtered and exposed to a sufficient amount of UV radiation.
- the solution is filtered to 0.5 microns, irradiated with a 150 W, medium-pressure UV bulb 72 , and circulated through the UV disinfection at a flow-rate of about 90 gal/min.
- the disinfection system 50 also includes a check valve 58 and a flow meter 68 positioned before and after the filtration system 60 , respectively, and a flow switch 78 for controlling the UV system 70 in response to the flow rate of the solution 16 .
- the check valve 58 is designed for fluid to flow through in only one direction and is positioned before the pump 52 to ensure the system remains primed once the pump motor is turned off without allowing the solution 16 to reverse flow backward into the chamber 12 .
- a 1 ⁇ 2′′ Schedule 80 ball valve can be attached to the side port of the check valve 58 as a convenient way to release the solution 16 within the system into a bucket or other container for spill-free filter servicing and maintenance.
- the flow meter 68 is a precision 2′′ flow meter calibrated to +/ ⁇ 2 gallons per minute accuracy and also functions as a check valve once the pump motor is turned off.
- the flow meter 68 is positioned after the filtration system 60 and before the UV system 70 because of its dual functioning capability. While the system is pumping, the flow can be easily determined by reading the meter. Once the flow diminishes 10 to 15 gallons per minute below the standard operating rate, it is time to service the filters. While the pump is off, the flow meter 68 acts as a check valve that enables the system to remain primed without allowing the solution 16 to continue flowing forward into the chamber 12 .
- a 1 ⁇ 2′′ Schedule 80 ball valve can be attached to the side port of the flow meter 68 as a convenient way to release the solution 16 within the system into a bucket for spill-free filter servicing and maintenance.
- the flow switch 78 increases the systems efficiency by continually monitoring the deviations from optimum flow rates. Since it is designed to respond to flow only, (independent of line pressure, temperature, and environment), the flow switch 78 is plumbed in-line before the UV system 70 so that during emergency conditions (line breakage, pump failure, incorrect valve opening or closing) it signals the system of a malfunction and switches the electrical current to the UV light 74 off. When the flow rate surpasses the minimum threshold, it switches the electrical current to the UV light 74 on.
- the flow switch 78 is a safeguard to protect the chamber 12 and the building it is occupied within from the potential of a fire to develop due to excessive heat generated by operating the UV bulb 74 without liquid flowing through the system.
- the disinfection system 50 also includes an ozone injection system 80 .
- the ozone injection system 80 includes a 4 g/hr ozone generator 82 coupled to an ozone injector valve 84 that injects the ozone gas into the solution 16 .
- the system 80 also includes a water trap 86 for preventing fluid from entering the ozone generator 80 .
- the UV system 70 should be sufficient to inactivate any pathogens in the solution 16 . However, UV disinfection does not remove the dissolved organic compounds or chemical contaminants in the solution (such as from perfumes or other personal care products).
- the ozone system 80 breaks down (oxidizes) these compounds and also acts as a secondary disinfectant for killing any micro-organisms still remaining after UV disinfection. This combination of UV and ozone disinfection is as effective as chlorine disinfection but creates a much safer environment without any harmful chemical by-products.
- the disinfection system 50 may also include a peristaltic pump 90 coupled to a residual insert injector 92 for injecting a chemical residual into the solution 16 .
- the residual injector 92 may be combined with the ozone injector 84 to form one double injector.
- a chemical residual is unnecessary and undesirable for this isolation system since the solution 16 is disinfected between every use.
- the peristaltic pump 90 and injector 92 can be included in the system 50 in case a chemical residual is required by law.
- the isolation system 10 described herein is currently undergoing testing by the NSF (National Sanitation Foundation) to obtain certification that it complies with NSF standards without any chemical residual.
- the processed solution 16 is returned to the chamber 12 and then cycled through the disinfection system 50 again for a total of at least five cycles.
- all pipes and fittings for connecting the chamber 12 and the various parts of the disinfection system 50 are Schedule 80 PVC plastic certified NSF-PW or NSF-61. As described above, inside the chamber 12 , the solution 16 is only in contact with the non-toxic PVC liner 40 and the Schedule 80 vertical slot suction fittings 54 . The entire system is therefore fully potable.
- the disinfection system 50 is designed to be operated when the chamber 12 is not being used.
- the solution should be disinfected before each and every use.
- the entire volume of solution 16 should be processed through the disinfection system 50 at a rate of approximately 90 gal/min to achieve 3-log kill.
- a chamber 12 holding 250 gallons of solution should therefore be disinfected for about 10 minutes between each use.
- the isolation system 10 should also include an air disinfecting filtration system 94 (such as air disinfecting systems designed for use in surgical clean rooms) for disinfecting and filtering the air within the chamber 12 and killing any airborne pathogens.
- the system 10 also includes an oxygen (O2) concentrator 96 (a 5 L O2 concentrator is used in the illustrative embodiment) for injecting extra oxygen into the air supply.
- the air disinfection system 94 and oxygen concentrator 96 operate in conjunction to provide a continual supply of clean, oxygen-enriched air for the user to breathe while floating.
- a first air vent 98 couples the enriched air into the chamber 12 and a second air vent 100 allows air to exit the chamber 12 .
- the air vents 98 and 100 each include a 0.5′′ ball valve sticking out of the bottom port of a 1.5′′ Schedule 80 PVC tee to release any built-up liquid from trapped condensation.
- an improved method of disinfection is taught using UV radiation with ozone injection.
- Ozone has a short half-life and leaves substantially no toxic byproducts. Verification of disinfection can be accomplished by monitoring the dissolved ozone, which can be determined accurately utilizing a dissolved ozone sensor system.
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Abstract
An isolation chamber and disinfection system. The novel system includes an enclosure for providing a sturdy, lightless and soundproofed environment and for containing a solution for supporting a user in a state of floatation; a disinfection system for disinfecting the solution, the disinfection system including an ultraviolet disinfection system and an ozone injection system; and a pump for removing the solution from the enclosure and circulating it through the disinfection system at a predetermined flow rate. The enclosure is formed from interlocking, foam-insulated panels and lined with a potable liner that holds the solution. In relationship to the isolation chamber, in accordance with the present teachings, an improved method of disinfection is taught using UV radiation with ozone injection. Ozone has a short half-life and leaves substantially no toxic byproducts. Verification of disinfection can be accomplished by monitoring the dissolved ozone, which can be determined accurately utilizing a dissolved ozone sensor system.
Description
- This application claims priority from a Provisional Application entitled Isolation Floatation Chamber, filed Apr. 30, 2013, by C. Hoefler, application No. 61/817,373.
- 1. Field of the Invention
- The present invention relates to isolation chambers. More specifically, the present invention relates to systems and methods for disinfecting floatation tanks.
- 2. Description of the Related Art
- An isolation chamber, or floatation tank, is a dark, soundproofed enclosure containing a layer of salt water upon which a user floats, typically for relaxation or meditation purposes. The chamber is designed to isolate the user from external stimuli such as light, sound, smell, and, in particular, gravity. Epsom salt is usually added to the water in the isolation tank to increase the density of the solution such that the user floats comfortably near the surface with the face above the water. The buoyancy created by this salt solution effectively eliminates the body's specific gravity, bringing the floater close to an experience of total weightlessness.
- Isolation chambers for commercial usage must maintain proper sanitation practices to ensure a safe and healthy environment for the users. As with swimming pools and other recreational water facilities, the water in an isolation chamber is subject to undesirable contaminants introduced by the users and environment. These contaminants may include pathogenic micro-organisms such as viruses, bacteria, protozoa, and fungi. Commercial isolation chambers should therefore include a properly designed disinfection system for killing these micro-organisms to prevent the transmission of infectious diseases.
- Conventional isolation chambers typically rely on chemical disinfectants such as chlorine for water sanitation. Chlorine disinfection is inexpensive, quick and effective at killing most pathogenic microbes, and leaves a residual in the water that continues disinfecting for a long period of time. Residual chlorine is desirable, and often required, for public swimming pools and similar venues where a user may be exposed to contaminants introduced by other swimmers. This residual is used to validate a certain level of decontamination. This criteria is designed to be used with regular water in an open space.
- In a magnesium sulfate solution one cannot accurately monitor the chemical residual, making it impossible for either the operator or public health authority to determine correct measurement of disinfecting chemicals, resulting in blind dosing.
- Chemical disinfectants react with organic matter to produce toxic disinfection by-products such as trihalomethanes, haloacetic acids, chlorite, and others. In particular, chlorine reacts with ammonia or nitrogen containing compounds such as sweat, saliva, and urine to produce chloramines. Exposure to chloramines can cause respiratory problems, rashes and other skin conditions, eye irritation, digestive disorders, and other health issues. In addition, chloramines also produce an irritating odor which is particularly undesirable for isolation chambers, where the desired goal is to isolate the user as much as possible from external stimuli.
- Hence, a need exists in the art for an improved system or method for sanitizing and monitoring isolation chambers that is safer than conventional chemical approaches.
- The need in the art is addressed by the isolation system of the present invention. The novel system includes an enclosure for providing a lightless and soundproofed environment and for containing a solution for supporting a user in a state of floatation; a disinfection system for disinfecting the solution, the disinfection system including an ultraviolet disinfection system and an ozone injection system; and a pump for removing the solution from the enclosure and circulating it through the disinfection system at a predetermined flow rate. In an illustrative embodiment, the disinfection system includes a multi-stage filtration system with a 10 micron pre-filter, a 5 micron pre-filter, and a 0.5 micron filter; a 150 Watt medium-pressure ultraviolet lamp; a 4 grams/hr ozone generator; and a pump for providing a flow-rate of about 90 gallons per minute. The enclosure is formed from interlocking, foam-insulated panels and lined with a potable liner that holds the solution.
- In relationship to the isolation chamber, in accordance with the present teachings, an improved method of disinfection is taught using UV radiation with ozone injection. Ozone has a short half-life and leaves substantially no toxic byproducts. Verification of disinfection can be accomplished by monitoring the dissolved ozone, which can be determined accurately utilizing a dissolved ozone sensor system.
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FIG. 1 is a simplified diagram of an isolation system designed in accordance with an illustrative embodiment of the present invention. -
FIG. 2 is a simplified diagram of an interior of an isolation chamber designed in accordance with an illustrative embodiment of the present invention. -
FIG. 3 is a simplified diagram showing a cut-out view of two insulated panels designed in accordance with an illustrative embodiment of the present invention. - Illustrative embodiments and exemplary applications will now be described with reference to the accompanying drawings to disclose the advantageous teachings of the present invention.
- While the present invention is described herein with reference to illustrative embodiments for particular applications, it should be understood that the invention is not limited thereto. Those having ordinary skill in the art and access to the teachings provided herein will recognize additional modifications, applications, and embodiments within the scope thereof and additional fields in which the present invention would be of significant utility.
- The present invention provides a novel isolation chamber and disinfection system designed for commercial usage. Unlike conventional isolation tanks, the inventive system does not rely on chemical disinfectants. Instead, it uses a combination of UV (ultraviolet) radiation and ozone to disinfect the floatation solution. In accordance with the present teachings, the solution is disinfected between each and every use. Thus, there is no need for a residual disinfect (that continues disinfecting during operation) since there is no cross-contamination between users. The only contaminants that a user would be exposed to are the contaminants brought into the chamber by the user himself, and any contaminants remaining in the solution after the disinfection process. The system is therefore designed to thoroughly kill pathogens and break down organic compounds in the solution without producing any harmful by-products, leaving a pure, clean, and safe environment for the next user.
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FIG. 1 is a simplified diagram showing an external view of anisolation system 10 designed in accordance with an illustrative embodiment of the present invention, whileFIG. 2 shows an interior view of theisolation chamber 12. As shown inFIGS. 1 and 2 , theisolation system 10 includes anisolation chamber 12, which is a lightless, soundproofed enclosure designed to provide a light- and sound-free environment therein. Adoor 14 provides access to thechamber 12. Thechamber 12 contains asolution 16 having a specific gravity of about 1.25 to 1.3 for supporting a user in a state of floatation. In the illustrative embodiment, thechamber 12 contains a 12 inch deep,saturated solution 16 of 1000 lbs of USP grade magnesium sulfate (Epsom salt) in about 250 gallons of water. Thechamber 12 includesheating pads 18 coupled to aheater controller 20 andsensor 22 for maintaining the temperature of the solution to match skin temperature (approximately 95°). The user floats in thechamber 12 in a dark, silent environment, with a feeling of weightlessness. - In the preferred embodiment, the
chamber 12 is formed from interlockinginsulated panels 24.FIG. 3 shows a cut-out view of two insulatedpanels 24 designed in accordance with an illustrative embodiment of the present teachings. Eachpanel 24 includes a 3.5″thick wood frame 26 with anexterior skin 28 andinterior skin 30. In the illustrative embodiment, theskins panel 24 is filled with injectedfoam insulation 32 such as polyurethane or polystyrene. Thepanels 24 also includesteel cam locks 34 for securely attachingadjacent panels 24 together. Similar panels are commonly used for walk-in refrigeration units. Thesepanels 24 are excellent for creating a sturdy, light-proof, sound resistant, and non-rusting enclosure for theisolation chamber 12 that can be easily assembled and dismantled. - The size of the
chamber 12 should be sufficient for a single user to easily enter and exit as well as stand up and lay down inside (minimum 4 ft width, 8 ft length, and 7 ft height). For safety, theenclosure 12 should have anon-latching door 14 that pushes open easily from the inside (using, for example, magnetic gaskets). Ideally, thedoor 14 should seal flat on the outside so that thedoor 14 cannot be opened from the outside without the use of theexterior handle 15, which should be positioned horizontal at about 48″ from the ground so that a child cannot enter thechamber 12 without help from an adult. Thedoor 14 should be a minimum of 29″ wide by 50″ tall. Safety grab bars may be included inside theenclosure 12 for user assistance. - As shown in
FIG. 2 , the interior of thechamber 12 includes aliner 40 for containing thefloatation solution 16. In the illustrative embodiment, theliner 40 is made from potable, non-toxic PVC, preferably at least 0.40 mil thick. Theliner 40 can be custom made to fit the size and shape of theenclosure 12 and then attached to thepanels 24 of thechamber 12 using hang tabs positioned along the top outer perimeter. The tabs are stapled into the rim prior to the placement of the ceiling panel to secure theliner 40 in position. In the preferred embodiment, theliner 40 fully encompasses the interior dimensions of thestructure 12. A non-slip floor pad should be added on top of theliner 40 near the entry. - The
heating pads 18 are attached using adhesive to the interior wall of thechamber 12 between theinsulated panel 24 and theliner 40, at a height where the entire pad is below the water level. The user is therefore never in direct contact with theheaters 18, only with thenon-toxic liner 40, the potable suction fittings 54 (shown inFIG. 2 ), and the purifiedsolution 16. - As shown in
FIG. 1 , theisolation system 10 includes anovel disinfection system 50 located external to thechamber 12 for cleaning and disinfecting thesolution 16 before each use. Thedisinfection system 50 includes apump 52 for removing thesolution 16 from thechamber 12, afiltration system 60 for removing larger particles from thesolution 16, aUV disinfection system 70, and anozone injection system 80. - In the illustrative embodiment, the
pump 52 is a 1 hp high-head pump that circulates thesolution 16 through thedisinfection system 50 at a flow rate of about 90 gal/min. The flow rate must be compatible with theUV disinfection system 70. UV radiation is only effective at a certain flow rate. If the solution travels through thesystem 70 too quickly, it will not receive enough UV exposure to have an adequate kill factor. If the flow is too slow, however, heat may build up and damage theUV lamp 72. - The
solution 16 is extracted from thechamber 12 by thepump 52 through two VGB compliant suction fittings 54 (shown inFIG. 2 ), located at least 36 inches apart. A 2″cross 56 is positioned directly in the center of the twosuction fittings 54 to ensure that thepump 52 is pulling solution equally from both sides. Pulling thesolution 16 from two locations safeguards that if someone is in thechamber 12 while thepump 52 is on, he will not be trapped by the suction and held underwater. Even though the disinfection system is not designed to be used when someone is in thechamber 12, thesystem 10 should still be VGA compliant for optimal safety. - In the preferred embodiment, the
suction fittings 54 are 4″Schedule 80 PVC vertical slot suction fittings serve as turbulent water intakes. The verticalslot suction fittings 54 are used to effectively remove surface debris (such as hair, skin cells, micro-organisms, etc.) from thesolution 16, each at a rate of about 50 gallons per minute. Each partially submerged vertical slot suction fitting 54 has eight ¼″ wide vertical slots that run the elevation of the fitting permitting thesolution 16 to be pulled from variable depths, from all around (360 degrees), and without pulling air into system. The verticalslot suction fittings 54 should be APSP-16 compliant. - In accordance with the present teachings, the
filtration system 60 includes at least two filters: a pre-filter 62 with a 5 micron cartridge followed by afilter 64 with a 0.5 micron cartridge. In a preferred embodiment, thefiltration system 60 also includes anadditional pre-filter 66 with a 10 micron cartridge before the 5micron pre-filter 62. Thefiltration system 60 therefore removes all particles larger than 0.5 microns from thesolution 16. This is important since the presence of particles can reduce the effectiveness of the UV disinfection. Filter cartridges used for conventional pool filtration systems (typically 20 micron) are insufficient for this purpose. Cartridges rated at 5 micron and 0.5 micron can be custom made by a good filter manufacturer. In a preferred embodiment, the 2″cross 56 includes a 0.5″ ball valve out of the top port that works as a pressure release so that the filters can be serviced without entering thechamber 12 to release the pressure by removing thesuction fittings 54 at the 1.5″ unions. - After filtration, the
solution 16 goes through UV disinfection. In accordance with the present teachings, theUV disinfection system 70 includes aUV lamp 72 positioned to irradiate thesolution 16 as it flows by. TheUV lamp 72 should include a 150 W, medium-pressure (broad spectrum) germicidal UV bulb with aclose proximity Schedule 80 housing. Thesystem 70 also includes aUV ballast 74 for regulating the electrical current flow to theUV bulb 72. Theballast 74 minimizes power fluctuations that can affect the wavelength of the UV radiation and reduce the effectiveness of the UV disinfection. UV disinfection is highly effective at inactivating microorganisms if the solution is properly filtered and exposed to a sufficient amount of UV radiation. In accordance with the present teachings, the solution is filtered to 0.5 microns, irradiated with a 150 W, medium-pressure UV bulb 72, and circulated through the UV disinfection at a flow-rate of about 90 gal/min. - In a preferred embodiment, the
disinfection system 50 also includes acheck valve 58 and aflow meter 68 positioned before and after thefiltration system 60, respectively, and aflow switch 78 for controlling theUV system 70 in response to the flow rate of thesolution 16. Thecheck valve 58 is designed for fluid to flow through in only one direction and is positioned before thepump 52 to ensure the system remains primed once the pump motor is turned off without allowing thesolution 16 to reverse flow backward into thechamber 12. A ½″Schedule 80 ball valve can be attached to the side port of thecheck valve 58 as a convenient way to release thesolution 16 within the system into a bucket or other container for spill-free filter servicing and maintenance. - The
flow meter 68 is a precision 2″ flow meter calibrated to +/−2 gallons per minute accuracy and also functions as a check valve once the pump motor is turned off. Theflow meter 68 is positioned after thefiltration system 60 and before theUV system 70 because of its dual functioning capability. While the system is pumping, the flow can be easily determined by reading the meter. Once the flow diminishes 10 to 15 gallons per minute below the standard operating rate, it is time to service the filters. While the pump is off, theflow meter 68 acts as a check valve that enables the system to remain primed without allowing thesolution 16 to continue flowing forward into thechamber 12. A ½″Schedule 80 ball valve can be attached to the side port of theflow meter 68 as a convenient way to release thesolution 16 within the system into a bucket for spill-free filter servicing and maintenance. - The
flow switch 78 increases the systems efficiency by continually monitoring the deviations from optimum flow rates. Since it is designed to respond to flow only, (independent of line pressure, temperature, and environment), theflow switch 78 is plumbed in-line before theUV system 70 so that during emergency conditions (line breakage, pump failure, incorrect valve opening or closing) it signals the system of a malfunction and switches the electrical current to theUV light 74 off. When the flow rate surpasses the minimum threshold, it switches the electrical current to theUV light 74 on. Theflow switch 78 is a safeguard to protect thechamber 12 and the building it is occupied within from the potential of a fire to develop due to excessive heat generated by operating theUV bulb 74 without liquid flowing through the system. - The
disinfection system 50 also includes anozone injection system 80. Theozone injection system 80 includes a 4 g/hr ozone generator 82 coupled to anozone injector valve 84 that injects the ozone gas into thesolution 16. In the preferred embodiment, thesystem 80 also includes awater trap 86 for preventing fluid from entering theozone generator 80. TheUV system 70 should be sufficient to inactivate any pathogens in thesolution 16. However, UV disinfection does not remove the dissolved organic compounds or chemical contaminants in the solution (such as from perfumes or other personal care products). Theozone system 80 breaks down (oxidizes) these compounds and also acts as a secondary disinfectant for killing any micro-organisms still remaining after UV disinfection. This combination of UV and ozone disinfection is as effective as chlorine disinfection but creates a much safer environment without any harmful chemical by-products. - Optionally, the
disinfection system 50 may also include aperistaltic pump 90 coupled to aresidual insert injector 92 for injecting a chemical residual into thesolution 16. Theresidual injector 92 may be combined with theozone injector 84 to form one double injector. As discussed above, a chemical residual is unnecessary and undesirable for this isolation system since thesolution 16 is disinfected between every use. However, theperistaltic pump 90 andinjector 92 can be included in thesystem 50 in case a chemical residual is required by law. Theisolation system 10 described herein is currently undergoing testing by the NSF (National Sanitation Foundation) to obtain certification that it complies with NSF standards without any chemical residual. - After disinfection, the processed
solution 16 is returned to thechamber 12 and then cycled through thedisinfection system 50 again for a total of at least five cycles. In the preferred embodiment, all pipes and fittings for connecting thechamber 12 and the various parts of thedisinfection system 50 areSchedule 80 PVC plastic certified NSF-PW or NSF-61. As described above, inside thechamber 12, thesolution 16 is only in contact with thenon-toxic PVC liner 40 and theSchedule 80 verticalslot suction fittings 54. The entire system is therefore fully potable. - The
disinfection system 50 is designed to be operated when thechamber 12 is not being used. The solution should be disinfected before each and every use. During a complete disinfection process, the entire volume ofsolution 16 should be processed through thedisinfection system 50 at a rate of approximately 90 gal/min to achieve 3-log kill. Achamber 12 holding 250 gallons of solution should therefore be disinfected for about 10 minutes between each use. - The
isolation system 10 should also include an air disinfecting filtration system 94 (such as air disinfecting systems designed for use in surgical clean rooms) for disinfecting and filtering the air within thechamber 12 and killing any airborne pathogens. In the preferred embodiment, thesystem 10 also includes an oxygen (O2) concentrator 96 (a 5 L O2 concentrator is used in the illustrative embodiment) for injecting extra oxygen into the air supply. Theair disinfection system 94 andoxygen concentrator 96 operate in conjunction to provide a continual supply of clean, oxygen-enriched air for the user to breathe while floating. Afirst air vent 98 couples the enriched air into thechamber 12 and asecond air vent 100 allows air to exit thechamber 12. The air vents 98 and 100 each include a 0.5″ ball valve sticking out of the bottom port of a 1.5″Schedule 80 PVC tee to release any built-up liquid from trapped condensation. - Thus, the present invention has been described herein with reference to a particular embodiment for a particular application. In relationship to the isolation chamber, in accordance with the present teachings, an improved method of disinfection is taught using UV radiation with ozone injection. Ozone has a short half-life and leaves substantially no toxic byproducts. Verification of disinfection can be accomplished by monitoring the dissolved ozone, which can be determined accurately utilizing a dissolved ozone sensor system.
- Those having ordinary skill in the art and access to the present teachings will recognize additional modifications, applications and embodiments within the scope thereof.
- It is therefore intended by the appended claims to cover any and all such applications, modifications and embodiments within the scope of the present invention.
- Accordingly,
Claims (20)
1. An isolation system comprising:
an enclosure for providing a lightless and soundproofed environment and containing a solution for supporting a user in a state of floatation;
a disinfection system for disinfecting said solution, said disinfection system including an ultraviolet disinfection system and an ozone injection system; and
first means for circulating said solution through said disinfection system at a predetermined flow rate.
2. The invention of claim 1 wherein said first means includes a pump for removing said solution from said enclosure.
3. The invention of claim 2 wherein said pump removes said solution from said enclosure through at least two suction fittings with 360 degree vertical slots partially submerged in said solution.
4. The invention of claim 2 wherein said pump circulates said solution at a flow rate of approximately 90 gallons per minute.
5. The invention of claim 4 wherein said ultraviolet disinfection system includes a 150 Watt, medium-pressure ultraviolet bulb positioned to irradiate said solution.
6. The invention of claim 5 wherein said ultraviolet disinfection system further includes a ballast for regulating electrical current flow to said ultraviolet bulb.
7. The invention of claim 1 wherein said disinfection system further includes a flow switch for controlling electrical current supplied to said ultraviolet system in response to a flow rate of said solution.
8. The invention of claim 1 wherein said disinfection system further includes a filtration system for filtering said solution prior to ultraviolet disinfection.
9. The invention of claim 8 wherein said filtration system includes a 0.5 micron filter.
10. The invention of claim 9 wherein said filtration system further includes a 5 micron pre-filter.
11. The invention of claim 10 wherein said filtration system further includes a 20 micron pre-filter.
12. The invention of claim 1 wherein said ozone injection system includes a 4 grams per hour ozone generator.
13. The invention of claim 12 wherein said ozone injection system further includes a valve for injecting ozone from said generator into said solution.
14. The invention of claim 1 wherein said isolation system further includes an air disinfecting system for disinfecting air within said enclosure.
15. The invention of claim 14 wherein said isolation system further includes an oxygen concentrator for adding oxygen gas into said enclosure.
16. The invention of claim 1 wherein said enclosure is formed from interlocking, foam-insulated panels.
17. The invention of claim 16 wherein said isolation system further includes a potable liner for containing said solution attached to said panels and lining an interior of said enclosure.
18. The invention of claim 17 wherein said isolation system further includes one or more heating elements disposed between said liner and said panels for maintaining said solution at a predetermined temperature.
19. An isolation system comprising:
an enclosure for providing a lightless and soundproofed environment and containing a solution for supporting a user in a state of floatation;
turbulent water intakes for effectively remove surface debris from said solution and means for circulating said solution at a predetermined flow rate.
20. An isolation chamber comprising:
a plurality of interlocking, foam-insulated panels configured to form a sturdy, lightless and soundproofed enclosure and
a potable liner for containing a solution for supporting a user in a state of floatation inside said enclosure, wherein said liner is attached to said panels and lines an interior of said enclosure.
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US14/265,336 US9956374B2 (en) | 2013-04-30 | 2014-04-29 | Isolation floatation chamber |
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